Vehicle linkage

A linkage for coupling a vehicle to a ground-engaging implement to allow said ground-engaging implement to be lifted and tilted, said linkage comprising a first link and a second link, each said link having a first end and a second end and a longitudinal axis passing through the first and second ends of each said link, said first link being joined at one end to the vehicle by a multidirectional joint permitting pivotal movement between the vehicle and the one end of said first link both around said longitudinal axis of said first link and around a line transverse to said longitudinal axis of said first link and joined at its other end to the ground-engaging implement by a unidirectional joint permitting pivotal movement between the ground-engaging implement and the other end of said first link only around a line transverse to said longitudinal axis of the first link;

• and said second link being joined at one end to the vehicle by a unidirectional joint permitting pivotal movement between the vehicle and the one end of said second link only around a line transverse to the longitudinal axis of said second link and joined at its other end to the ground-engaging implement by a multidirectional joint permitting pivotal movement between the ground-engaging implement and the other end of said second link around the longitudinal axis of said second link and also around a line transverse to said longitudinal axis of said second link.

A linkage for coupling a vehicle to a ground-engaging implement to allow said ground-engaging implement to be lifted and tilted, comprising first and second links disposed one above the other and spaced apart vertically, each said link having a first end and a second end and a longitudinal axis passing through the first and second ends of each said link, said first end of said first link being joined to the vehicle to allow pivotal movement between the vehicle and the first end of said first link both around said longitudinal axis of said first link and around a line transverse to said longitudinal axis of said first link and said second end of said first link being joined to the ground-engaging implement to allow pivotal movement between the ground-engaging implement and the second end of said first link only around a line transverse to said longitudinal axis of said first link;

• said first end of said second link being joined to the vehicle to allow pivotal movement between the vehicle and the first end of said second link only around a line transverse to said longitudinal axis of said second link and said second end of said second link being joined to the ground-engaging implement to allow pivotal movement between the ground-engaging implement and the second end of said second link around a longitudinal axis of said second link and also around a line transverse to said longitudinal axis of said second link.

A linkage for coupling a vehicle to a ground-engaging implement to allow said ground-engaging implement to be lifted and tilted, comprising first and second links, each said link having a first end and a second end and a longitudinal axis passing through the first and second ends of each said link, said first end of said first link being pivotally connected to the vehicle to allow pivotal movement between the vehicle and the first end of said first link both around said longitudinal axis of said first link and around a line transverse to said longitudinal axis of said first link and said second end of said first link being joined to the ground-engaging implement by a plurality of spaced-apart unidirectional joints, to allow pivotal movement between the ground-engaging implement and the second end of said first link only around a line transverse to the longitudinal axis of said first link, said first end of said second link being pivotally connected to the vehicle along a line by a plurality of unidirectional joints spaced apart along said line to allow pivotal movement between the vehicle and the first end of said second link only around a line transverse to the longitudinal axis of said second link and said second end of said second link being pivotally connected to the ground-engaging implement to allow pivotal movement between the ground-engaging implement and the second end of said second link around said longitudinal axis of said second link and also around a line transverse to said longitudinal axis of said second link.

A linkage for coupling a vehicle to a ground-engaging implement comprising a first link and a second link, each said link having a first end and a second end and a longitudinal axis passing through the first and second ends of each said link, said first end of said first link being pivotally connected to the vehicle to allow pivotal movement between the vehicle and the first end of said first link both around said longitudinal axis of said first link and around a line transverse to said longitudinal axis of said first link and said second end of said first link being pivotally connected to the ground-engaging implement to allow pivotal movement between the ground-engaging implement and the second end of said first link around a line transverse to said longitudinal axis of said first link;

• said first end of said second link being pivotally connected to the vehicle to allow pivotal movement between the vehicle and the first end of said second link around a line transverse to the longitudinal axis of said second link and said second end of said second link being pivotally connected to the ground-engaging implement to allow pivotal movement between the ground-engaging implement and the second end of said second link around said longitudinal axis of said second link and also around a line transverse to said longitudinal axis of said second link and a lifting device to raise and lower the ground-engaging implement out of and into engagement with the ground.